mirror of
https://github.com/zebrajr/react.git
synced 2026-01-15 12:15:22 +00:00
681a4aa810
Throw an error during module initialization if the version of the "react-dom" package does not match the version of "react". We used to be more relaxed about this, because the "react" package changed so infrequently. However, we now have many more features that rely on an internal protocol between the two packages, including Hooks, Float, and the compiler runtime. So it's important that both packages are versioned in lockstep. Before this change, a version mismatch would often result in a cryptic internal error with no indication of the root cause. Instead, we will now compare the versions during module initialization and immediately throw an error to catch mistakes as early as possible and provide a clear error message.
The error code system substitutes React's error messages with error IDs to provide a better debugging support in production. Check out the blog post here.
codes.jsoncontains the mapping from IDs to error messages. This file is generated by the Gulp plugin and is used by both the Babel plugin and the error decoder page in our documentation. This file is append-only, which means an existing code in the file will never be changed/removed.extract-errors.jsis an node script that traverses our codebase and updatescodes.json. You can test it by runningyarn extract-errors. It works by crawling the build artifacts directory, so you need to have either run the build script or downloaded pre-built artifacts (e.g. withyarn download build). It works with partial builds, too.transform-error-messagesis a Babel pass that rewrites error messages to IDs for a production (minified) build.